I donâ€™t have any babies, but use these in the freezer. Theyâ€™re an ideal size for small amounts of stock, etc. Sturdily made, the screw top is leakproof and thereâ€™s a nice square place on the lid to stick a freezer label. They bridge the gap between ice cube trays (fiddly except for herbs) and a container that fits - say - a single portion of soup.